74 Johnson 9.9 leaking oil

[Jimbo876]

I put all new seals in the gearbox and put a new impeller in and now I have a leak from the top end of the lower unit. When running I can see a little bit of oil slowly running out where the lower unit meets the housing. I can't figure this one out, anybody have the same experience with this motor?

 

[Bosunsmate]

Re: 74 Johnson 9.9 leaking oil

Is it gear oil?
Or just 2 stroke mix?

 

[Daviet]

Re: 74 Johnson 9.9 leaking oil

Does it have a gas smell to it, if so don't worry about it.

 

[Jimbo876]

Re: 74 Johnson 9.9 leaking oil

I haven't smelled it, it is at my shop so I will check that out tomorrow. I assumed it was gear oil because of the location, and it is kind of milky white. I never put in in gear, just ran it in neutral for a couple minutes and noticed it right away.

 

[racerone]

Re: 74 Johnson 9.9 leaking oil

This oil leaking is fairly normal on a 2 stroke after idling even more so.---Did you replace shift rod o-ring ?

 

[boobie]

Re: 74 Johnson 9.9 leaking oil

Have it pressure and vacuum checked. This should be done after every re-seal job.

 

[Jimbo876]

Re: 74 Johnson 9.9 leaking oil

I don't think I can pressure test it. The drive shaft is frozen in the head, so when I pull the lower unit the drive shaft stays in the head.

 

[racerone]

Re: 74 Johnson 9.9 leaking oil

????----------------How did you put " all new seals " in it , if driveshaft is stuck in the powerhead ?---How did you reassemble it ??-----------Would have been much easier to pull the shaft out of the crankshaft !!!

 

[Jimbo876]

Re: 74 Johnson 9.9 leaking oil

Lol. When I initially dropped the lower unit, the key on drive shaft just pulled through the collar. I had the motor upside down hanging from the shaft in a vise for two weeks trying to get the damn thing out of there. Finally just said screw it. When putting the lower unit back on I just had a friend slowly pull the start cord and once the key lined up to where it initially pulled through the collar it slipped right on.

 

[boobie]

Re: 74 Johnson 9.9 leaking oil

You can still pressure test it if it's all together.

 

[Jimbo876]

Re: 74 Johnson 9.9 leaking oil

Yeah, I guess so... just wont be able to see what seal the leak is from if there is one. I will mess with it and let you know what I find

 

[Jimbo876]

Re: 74 Johnson 9.9 leaking oil

Just thinking about it, it seams weird that it would be the gear lube because it leaks in neutral right? I mean, if it leaked when I had it in gear that would be a no brainer.